diff --git a/lib/c.zig b/lib/c.zig
index 31176d04c3..681a6f73a5 100644
--- a/lib/c.zig
+++ b/lib/c.zig
@@ -26,6 +26,7 @@ comptime {
     _ = @import("c/wchar.zig");
 
     _ = @import("c/sys.zig");
+    _ = @import("c/unistd.zig");
 
     if (builtin.target.isMuslLibC() or builtin.target.isWasiLibC()) {
         // Files specific to musl and wasi-libc.
diff --git a/lib/c/sys.zig b/lib/c/sys.zig
index d19baf1b0e..71e068616b 100644
--- a/lib/c/sys.zig
+++ b/lib/c/sys.zig
@@ -1,3 +1,7 @@
 comptime {
+    _ = @import("sys/mman.zig");
+    _ = @import("sys/file.zig");
+    _ = @import("sys/reboot.zig");
+    _ = @import("sys/capability.zig");
     _ = @import("sys/utsname.zig");
 }
diff --git a/lib/c/sys/capability.zig b/lib/c/sys/capability.zig
new file mode 100644
index 0000000000..19718a45e3
--- /dev/null
+++ b/lib/c/sys/capability.zig
@@ -0,0 +1,18 @@
+const std = @import("std");
+const common = @import("../common.zig");
+const builtin = @import("builtin");
+
+comptime {
+    if (builtin.target.isMuslLibC()) {
+        @export(&capsetLinux, .{ .name = "capset", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&capgetLinux, .{ .name = "capget", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn capsetLinux(hdrp: *anyopaque, datap: *anyopaque) callconv(.c) c_int {
+    return common.errno(std.os.linux.capset(@ptrCast(@alignCast(hdrp)), @ptrCast(@alignCast(datap))));
+}
+
+fn capgetLinux(hdrp: *anyopaque, datap: *anyopaque) callconv(.c) c_int {
+    return common.errno(std.os.linux.capget(@ptrCast(@alignCast(hdrp)), @ptrCast(@alignCast(datap))));
+}
diff --git a/lib/c/sys/file.zig b/lib/c/sys/file.zig
new file mode 100644
index 0000000000..643d3fcd03
--- /dev/null
+++ b/lib/c/sys/file.zig
@@ -0,0 +1,13 @@
+const std = @import("std");
+const common = @import("../common.zig");
+const builtin = @import("builtin");
+
+comptime {
+    if (builtin.target.isMuslLibC()) {
+        @export(&flockLinux, .{ .name = "flock", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn flockLinux(fd: c_int, operation: c_int) callconv(.c) c_int {
+    return common.errno(std.os.linux.flock(fd, operation));
+}
diff --git a/lib/c/sys/mman.zig b/lib/c/sys/mman.zig
new file mode 100644
index 0000000000..92de9ad076
--- /dev/null
+++ b/lib/c/sys/mman.zig
@@ -0,0 +1,59 @@
+const std = @import("std");
+const common = @import("../common.zig");
+const builtin = @import("builtin");
+
+comptime {
+    if (builtin.target.isMuslLibC()) {
+        @export(&madviseLinux, .{ .name = "madvise", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&madviseLinux, .{ .name = "__madvise", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&mincoreLinux, .{ .name = "mincore", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&mlockLinux, .{ .name = "mlock", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&mlockallLinux, .{ .name = "mlockall", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&mprotectLinux, .{ .name = "mprotect", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&mprotectLinux, .{ .name = "__mprotect", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&munlockLinux, .{ .name = "munlock", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&munlockallLinux, .{ .name = "munlockall", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&posix_madviseLinux, .{ .name = "posix_madvise", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn madviseLinux(addr: *anyopaque, len: usize, advice: c_int) callconv(.c) c_int {
+    return common.errno(std.os.linux.madvise(@ptrCast(addr), len, @bitCast(advice)));
+}
+
+fn mincoreLinux(addr: *anyopaque, len: usize, vec: [*]u8) callconv(.c) c_int {
+    return common.errno(std.os.linux.mincore(@ptrCast(addr), len, vec));
+}
+
+fn mlockLinux(addr: *const anyopaque, len: usize) callconv(.c) c_int {
+    return common.errno(std.os.linux.mlock(@ptrCast(addr), len));
+}
+
+fn mlockallLinux(flags: c_int) callconv(.c) c_int {
+    return common.errno(std.os.linux.mlockall(@bitCast(flags)));
+}
+
+fn mprotectLinux(addr: *anyopaque, len: usize, prot: c_int) callconv(.c) c_int {
+    const page_size = std.heap.pageSize();
+    const start = std.mem.alignBackward(usize, @intFromPtr(addr), page_size);
+    const aligned_len = std.mem.alignForward(usize, len, page_size);
+    return common.errno(std.os.linux.mprotect(@ptrFromInt(start), aligned_len, @bitCast(prot)));
+}
+
+fn munlockLinux(addr: *const anyopaque, len: usize) callconv(.c) c_int {
+    return common.errno(std.os.linux.munlock(@ptrCast(addr), len));
+}
+
+fn munlockallLinux() callconv(.c) c_int {
+    return common.errno(std.os.linux.munlockall());
+}
+
+fn posix_madviseLinux(addr: *anyopaque, len: usize, advice: c_int) callconv(.c) c_int {
+    if (advice == std.os.linux.MADV.DONTNEED) return 0;
+    return @intCast(-@as(isize, @bitCast(std.os.linux.madvise(@ptrCast(addr), len, @bitCast(advice)))));
+}
diff --git a/lib/c/sys/reboot.zig b/lib/c/sys/reboot.zig
new file mode 100644
index 0000000000..8b7b0503bd
--- /dev/null
+++ b/lib/c/sys/reboot.zig
@@ -0,0 +1,13 @@
+const std = @import("std");
+const common = @import("../common.zig");
+const builtin = @import("builtin");
+
+comptime {
+    if (builtin.target.isMuslLibC()) {
+        @export(&rebootLinux, .{ .name = "reboot", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn rebootLinux(cmd: c_int) callconv(.c) c_int {
+    return common.errno(std.os.linux.reboot(.MAGIC1, .MAGIC2, @enumFromInt(cmd), null));
+}
diff --git a/lib/c/unistd.zig b/lib/c/unistd.zig
new file mode 100644
index 0000000000..f903ef78a8
--- /dev/null
+++ b/lib/c/unistd.zig
@@ -0,0 +1,183 @@
+const std = @import("std");
+const common = @import("common.zig");
+const builtin = @import("builtin");
+const linux = std.os.linux;
+
+comptime {
+    if (builtin.target.isMuslLibC()) {
+        @export(&_exit, .{ .name = "_exit", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&accessLinux, .{ .name = "access", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&acctLinux, .{ .name = "acct", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&chdirLinux, .{ .name = "chdir", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&chownLinux, .{ .name = "chown", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&fchownatLinux, .{ .name = "fchownat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&lchownLinux, .{ .name = "lchown", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&chrootLinux, .{ .name = "chroot", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&ctermidLinux, .{ .name = "ctermid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&dupLinux, .{ .name = "dup", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&getegidLinux, .{ .name = "getegid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&geteuidLinux, .{ .name = "geteuid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getgidLinux, .{ .name = "getgid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getgroupsLinux, .{ .name = "getgroups", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getpgidLinux, .{ .name = "getpgid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getpgrpLinux, .{ .name = "getpgrp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&setpgidLinux, .{ .name = "setpgid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&setpgrpLinux, .{ .name = "setpgrp", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getsidLinux, .{ .name = "getsid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getpidLinux, .{ .name = "getpid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getppidLinux, .{ .name = "getppid", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&getuidLinux, .{ .name = "getuid", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&rmdirLinux, .{ .name = "rmdir", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&linkLinux, .{ .name = "link", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&linkatLinux, .{ .name = "linkat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&pipeLinux, .{ .name = "pipe", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&renameatLinux, .{ .name = "renameat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&symlinkLinux, .{ .name = "symlink", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&symlinkatLinux, .{ .name = "symlinkat", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&syncLinux, .{ .name = "sync", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&unlinkLinux, .{ .name = "unlink", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&unlinkatLinux, .{ .name = "unlinkat", .linkage = common.linkage, .visibility = common.visibility });
+
+        @export(&execveLinux, .{ .name = "execve", .linkage = common.linkage, .visibility = common.visibility });
+    }
+}
+
+fn _exit(exit_code: c_int) callconv(.c) noreturn {
+    std.c._Exit(exit_code);
+}
+
+fn accessLinux(path: [*:0]const c_char, amode: c_int) callconv(.c) c_int {
+    return common.errno(linux.access(@ptrCast(path), @bitCast(amode)));
+}
+
+fn acctLinux(path: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.acct(@ptrCast(path)));
+}
+
+fn chdirLinux(path: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.chdir(@ptrCast(path)));
+}
+
+fn chownLinux(path: [*:0]const c_char, uid: linux.uid_t, gid: linux.gid_t) callconv(.c) c_int {
+    return common.errno(linux.chown(@ptrCast(path), uid, gid));
+}
+
+fn fchownatLinux(fd: c_int, path: [*:0]const c_char, uid: linux.uid_t, gid: linux.gid_t, flags: c_int) callconv(.c) c_int {
+    return common.errno(linux.fchownat(fd, @ptrCast(path), uid, gid, @bitCast(flags)));
+}
+
+fn lchownLinux(path: [*:0]const c_char, uid: linux.uid_t, gid: linux.gid_t) callconv(.c) c_int {
+    return common.errno(linux.lchown(@ptrCast(path), uid, gid));
+}
+
+fn chrootLinux(path: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.chroot(@ptrCast(path)));
+}
+
+fn ctermidLinux(maybe_path: ?[*]c_char) callconv(.c) [*:0]c_char {
+    const default_tty = "/dev/tty";
+
+    return if (maybe_path) |path| blk: {
+        path[0..(default_tty.len + 1)].* = @bitCast(default_tty.*);
+        break :blk path[0..default_tty.len :0].ptr;
+    } else @ptrCast(@constCast(default_tty));
+}
+
+fn dupLinux(fd: c_int) callconv(.c) c_int {
+    return common.errno(linux.dup(fd));
+}
+
+fn getegidLinux() callconv(.c) linux.gid_t {
+    return linux.getegid();
+}
+
+fn geteuidLinux() callconv(.c) linux.uid_t {
+    return linux.geteuid();
+}
+
+fn getgidLinux() callconv(.c) linux.gid_t {
+    return linux.getgid();
+}
+
+fn getgroupsLinux(size: c_int, list: ?[*]linux.gid_t) callconv(.c) c_int {
+    return common.errno(linux.getgroups(@intCast(size), list));
+}
+
+fn getpgidLinux(pid: linux.pid_t) callconv(.c) linux.pid_t {
+    return common.errno(linux.getpgid(pid));
+}
+
+fn getpgrpLinux() callconv(.c) linux.pid_t {
+    return @intCast(linux.getpgid(0)); // @intCast as it cannot fail
+}
+
+fn setpgidLinux(pid: linux.pid_t, pgid: linux.pid_t) callconv(.c) c_int {
+    return common.errno(linux.setpgid(pid, pgid));
+}
+
+fn setpgrpLinux() callconv(.c) linux.pid_t {
+    return @intCast(linux.setpgid(0, 0)); // @intCast as it cannot fail
+}
+
+fn getpidLinux() callconv(.c) linux.pid_t {
+    return linux.getpid();
+}
+
+fn getppidLinux() callconv(.c) linux.pid_t {
+    return linux.getppid();
+}
+
+fn getsidLinux(pid: linux.pid_t) callconv(.c) linux.pid_t {
+    return common.errno(linux.getsid(pid));
+}
+
+fn getuidLinux() callconv(.c) linux.uid_t {
+    return linux.getuid();
+}
+
+fn linkLinux(old: [*:0]const c_char, new: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.link(@ptrCast(old), @ptrCast(new)));
+}
+
+fn linkatLinux(old_fd: c_int, old: [*:0]const c_char, new_fd: c_int, new: [*:0]const c_char, flags: c_int) callconv(.c) c_int {
+    return common.errno(linux.linkat(old_fd, @ptrCast(old), new_fd, @ptrCast(new), @bitCast(flags)));
+}
+
+fn pipeLinux(fd: *[2]c_int) callconv(.c) c_int {
+    return common.errno(linux.pipe(@ptrCast(fd)));
+}
+
+fn renameatLinux(old_fd: c_int, old: [*:0]const c_char, new_fd: c_int, new: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.renameat(old_fd, @ptrCast(old), new_fd, @ptrCast(new)));
+}
+
+fn rmdirLinux(path: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.rmdir(@ptrCast(path)));
+}
+
+fn symlinkLinux(existing: [*:0]const c_char, new: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.symlink(@ptrCast(existing), @ptrCast(new)));
+}
+
+fn symlinkatLinux(existing: [*:0]const c_char, fd: c_int, new: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.symlinkat(@ptrCast(existing), fd, @ptrCast(new)));
+}
+
+fn syncLinux() callconv(.c) void {
+    linux.sync();
+}
+
+fn unlinkLinux(path: [*:0]const c_char) callconv(.c) c_int {
+    return common.errno(linux.unlink(@ptrCast(path)));
+}
+
+fn unlinkatLinux(fd: c_int, path: [*:0]const c_char, flags: c_int) callconv(.c) c_int {
+    return common.errno(linux.unlinkat(fd, @ptrCast(path), @bitCast(flags)));
+}
+
+fn execveLinux(path: [*:0]const c_char, argv: [*:null]const ?[*:0]c_char, envp: [*:null]const ?[*:0]c_char) callconv(.c) c_int {
+    return common.errno(linux.execve(@ptrCast(path), @ptrCast(argv), @ptrCast(envp)));
+}
diff --git a/lib/libc/musl/src/linux/cap.c b/lib/libc/musl/src/linux/cap.c
deleted file mode 100644
index 8d035e07a4..0000000000
--- a/lib/libc/musl/src/linux/cap.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "syscall.h"
-
-int capset(void *a, void *b)
-{
-	return syscall(SYS_capset, a, b);
-}
-
-int capget(void *a, void *b)
-{
-	return syscall(SYS_capget, a, b);
-}
diff --git a/lib/libc/musl/src/linux/chroot.c b/lib/libc/musl/src/linux/chroot.c
deleted file mode 100644
index 0e69f145de..0000000000
--- a/lib/libc/musl/src/linux/chroot.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#define _GNU_SOURCE
-#include <unistd.h>
-#include "syscall.h"
-
-int chroot(const char *path)
-{
-	return syscall(SYS_chroot, path);
-}
diff --git a/lib/libc/musl/src/linux/flock.c b/lib/libc/musl/src/linux/flock.c
deleted file mode 100644
index 87aa5cfed2..0000000000
--- a/lib/libc/musl/src/linux/flock.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <sys/file.h>
-#include "syscall.h"
-
-int flock(int fd, int op)
-{
-	return syscall(SYS_flock, fd, op);
-}
diff --git a/lib/libc/musl/src/linux/reboot.c b/lib/libc/musl/src/linux/reboot.c
deleted file mode 100644
index 7f12af79bc..0000000000
--- a/lib/libc/musl/src/linux/reboot.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <sys/reboot.h>
-#include "syscall.h"
-
-int reboot(int type)
-{
-	return syscall(SYS_reboot, 0xfee1dead, 672274793, type);
-}
diff --git a/lib/libc/musl/src/mman/madvise.c b/lib/libc/musl/src/mman/madvise.c
deleted file mode 100644
index e0c7c0ec92..0000000000
--- a/lib/libc/musl/src/mman/madvise.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <sys/mman.h>
-#include "syscall.h"
-
-int __madvise(void *addr, size_t len, int advice)
-{
-	return syscall(SYS_madvise, addr, len, advice);
-}
-
-weak_alias(__madvise, madvise);
diff --git a/lib/libc/musl/src/mman/mincore.c b/lib/libc/musl/src/mman/mincore.c
deleted file mode 100644
index 4bb19f857c..0000000000
--- a/lib/libc/musl/src/mman/mincore.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#define _GNU_SOURCE
-#include <sys/mman.h>
-#include "syscall.h"
-
-int mincore (void *addr, size_t len, unsigned char *vec)
-{
-	return syscall(SYS_mincore, addr, len, vec);
-}
diff --git a/lib/libc/musl/src/mman/mlock.c b/lib/libc/musl/src/mman/mlock.c
deleted file mode 100644
index 71af582fe6..0000000000
--- a/lib/libc/musl/src/mman/mlock.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <sys/mman.h>
-#include "syscall.h"
-
-int mlock(const void *addr, size_t len)
-{
-#ifdef SYS_mlock
-	return syscall(SYS_mlock, addr, len);
-#else
-	return syscall(SYS_mlock2, addr, len, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/mman/mlockall.c b/lib/libc/musl/src/mman/mlockall.c
deleted file mode 100644
index 0ba4e662c8..0000000000
--- a/lib/libc/musl/src/mman/mlockall.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <sys/mman.h>
-#include "syscall.h"
-
-int mlockall(int flags)
-{
-	return syscall(SYS_mlockall, flags);
-}
diff --git a/lib/libc/musl/src/mman/mprotect.c b/lib/libc/musl/src/mman/mprotect.c
deleted file mode 100644
index 535787b9ec..0000000000
--- a/lib/libc/musl/src/mman/mprotect.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <sys/mman.h>
-#include "libc.h"
-#include "syscall.h"
-
-int __mprotect(void *addr, size_t len, int prot)
-{
-	size_t start, end;
-	start = (size_t)addr & -PAGE_SIZE;
-	end = (size_t)((char *)addr + len + PAGE_SIZE-1) & -PAGE_SIZE;
-	return syscall(SYS_mprotect, start, end-start, prot);
-}
-
-weak_alias(__mprotect, mprotect);
diff --git a/lib/libc/musl/src/mman/munlock.c b/lib/libc/musl/src/mman/munlock.c
deleted file mode 100644
index 2cccef0c50..0000000000
--- a/lib/libc/musl/src/mman/munlock.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <sys/mman.h>
-#include "syscall.h"
-
-int munlock(const void *addr, size_t len)
-{
-	return syscall(SYS_munlock, addr, len);
-}
diff --git a/lib/libc/musl/src/mman/munlockall.c b/lib/libc/musl/src/mman/munlockall.c
deleted file mode 100644
index 6e9d39d684..0000000000
--- a/lib/libc/musl/src/mman/munlockall.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <sys/mman.h>
-#include "syscall.h"
-
-int munlockall(void)
-{
-	return syscall(SYS_munlockall);
-}
diff --git a/lib/libc/musl/src/mman/posix_madvise.c b/lib/libc/musl/src/mman/posix_madvise.c
deleted file mode 100644
index e5e5acb84a..0000000000
--- a/lib/libc/musl/src/mman/posix_madvise.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#define _GNU_SOURCE
-#include <sys/mman.h>
-#include "syscall.h"
-
-int posix_madvise(void *addr, size_t len, int advice)
-{
-	if (advice == MADV_DONTNEED) return 0;
-	return -__syscall(SYS_madvise, addr, len, advice);
-}
diff --git a/lib/libc/musl/src/process/execve.c b/lib/libc/musl/src/process/execve.c
deleted file mode 100644
index 70286a1739..0000000000
--- a/lib/libc/musl/src/process/execve.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int execve(const char *path, char *const argv[], char *const envp[])
-{
-	/* do we need to use environ if envp is null? */
-	return syscall(SYS_execve, path, argv, envp);
-}
diff --git a/lib/libc/musl/src/unistd/_exit.c b/lib/libc/musl/src/unistd/_exit.c
deleted file mode 100644
index 769948232e..0000000000
--- a/lib/libc/musl/src/unistd/_exit.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include <stdlib.h>
-
-_Noreturn void _exit(int status)
-{
-	_Exit(status);
-}
diff --git a/lib/libc/musl/src/unistd/access.c b/lib/libc/musl/src/unistd/access.c
deleted file mode 100644
index d6eed68398..0000000000
--- a/lib/libc/musl/src/unistd/access.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int access(const char *filename, int amode)
-{
-#ifdef SYS_access
-	return syscall(SYS_access, filename, amode);
-#else
-	return syscall(SYS_faccessat, AT_FDCWD, filename, amode, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/acct.c b/lib/libc/musl/src/unistd/acct.c
deleted file mode 100644
index 308ffc3821..0000000000
--- a/lib/libc/musl/src/unistd/acct.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#define _GNU_SOURCE
-#include <unistd.h>
-#include "syscall.h"
-
-int acct(const char *filename)
-{
-	return syscall(SYS_acct, filename);
-}
diff --git a/lib/libc/musl/src/unistd/chdir.c b/lib/libc/musl/src/unistd/chdir.c
deleted file mode 100644
index 5ba78b6317..0000000000
--- a/lib/libc/musl/src/unistd/chdir.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int chdir(const char *path)
-{
-	return syscall(SYS_chdir, path);
-}
diff --git a/lib/libc/musl/src/unistd/chown.c b/lib/libc/musl/src/unistd/chown.c
deleted file mode 100644
index 14b032550d..0000000000
--- a/lib/libc/musl/src/unistd/chown.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int chown(const char *path, uid_t uid, gid_t gid)
-{
-#ifdef SYS_chown
-	return syscall(SYS_chown, path, uid, gid);
-#else
-	return syscall(SYS_fchownat, AT_FDCWD, path, uid, gid, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/ctermid.c b/lib/libc/musl/src/unistd/ctermid.c
deleted file mode 100644
index 1612770af1..0000000000
--- a/lib/libc/musl/src/unistd/ctermid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-
-char *ctermid(char *s)
-{
-	return s ? strcpy(s, "/dev/tty") : "/dev/tty";
-}
diff --git a/lib/libc/musl/src/unistd/dup.c b/lib/libc/musl/src/unistd/dup.c
deleted file mode 100644
index 7fee01201b..0000000000
--- a/lib/libc/musl/src/unistd/dup.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int dup(int fd)
-{
-	return syscall(SYS_dup, fd);
-}
diff --git a/lib/libc/musl/src/unistd/fchownat.c b/lib/libc/musl/src/unistd/fchownat.c
deleted file mode 100644
index 62457a3ec0..0000000000
--- a/lib/libc/musl/src/unistd/fchownat.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int fchownat(int fd, const char *path, uid_t uid, gid_t gid, int flag)
-{
-	return syscall(SYS_fchownat, fd, path, uid, gid, flag);
-}
diff --git a/lib/libc/musl/src/unistd/getegid.c b/lib/libc/musl/src/unistd/getegid.c
deleted file mode 100644
index 6287490da2..0000000000
--- a/lib/libc/musl/src/unistd/getegid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-gid_t getegid(void)
-{
-	return __syscall(SYS_getegid);
-}
diff --git a/lib/libc/musl/src/unistd/geteuid.c b/lib/libc/musl/src/unistd/geteuid.c
deleted file mode 100644
index 88f2cd5382..0000000000
--- a/lib/libc/musl/src/unistd/geteuid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-uid_t geteuid(void)
-{
-	return __syscall(SYS_geteuid);
-}
diff --git a/lib/libc/musl/src/unistd/getgid.c b/lib/libc/musl/src/unistd/getgid.c
deleted file mode 100644
index 1c9fe7157b..0000000000
--- a/lib/libc/musl/src/unistd/getgid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-gid_t getgid(void)
-{
-	return __syscall(SYS_getgid);
-}
diff --git a/lib/libc/musl/src/unistd/getgroups.c b/lib/libc/musl/src/unistd/getgroups.c
deleted file mode 100644
index 0e6e63af01..0000000000
--- a/lib/libc/musl/src/unistd/getgroups.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int getgroups(int count, gid_t list[])
-{
-	return syscall(SYS_getgroups, count, list);
-}
diff --git a/lib/libc/musl/src/unistd/getpgid.c b/lib/libc/musl/src/unistd/getpgid.c
deleted file mode 100644
index d295bfd59b..0000000000
--- a/lib/libc/musl/src/unistd/getpgid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-pid_t getpgid(pid_t pid)
-{
-	return syscall(SYS_getpgid, pid);
-}
diff --git a/lib/libc/musl/src/unistd/getpgrp.c b/lib/libc/musl/src/unistd/getpgrp.c
deleted file mode 100644
index 90e9bb07f6..0000000000
--- a/lib/libc/musl/src/unistd/getpgrp.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-pid_t getpgrp(void)
-{
-	return __syscall(SYS_getpgid, 0);
-}
diff --git a/lib/libc/musl/src/unistd/getpid.c b/lib/libc/musl/src/unistd/getpid.c
deleted file mode 100644
index a6d4e6d1bc..0000000000
--- a/lib/libc/musl/src/unistd/getpid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-pid_t getpid(void)
-{
-	return __syscall(SYS_getpid);
-}
diff --git a/lib/libc/musl/src/unistd/getppid.c b/lib/libc/musl/src/unistd/getppid.c
deleted file mode 100644
index 05cade53b6..0000000000
--- a/lib/libc/musl/src/unistd/getppid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-pid_t getppid(void)
-{
-	return __syscall(SYS_getppid);
-}
diff --git a/lib/libc/musl/src/unistd/getsid.c b/lib/libc/musl/src/unistd/getsid.c
deleted file mode 100644
index 93ba690e7e..0000000000
--- a/lib/libc/musl/src/unistd/getsid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-pid_t getsid(pid_t pid)
-{
-	return syscall(SYS_getsid, pid);
-}
diff --git a/lib/libc/musl/src/unistd/getuid.c b/lib/libc/musl/src/unistd/getuid.c
deleted file mode 100644
index 61309d1b79..0000000000
--- a/lib/libc/musl/src/unistd/getuid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-uid_t getuid(void)
-{
-	return __syscall(SYS_getuid);
-}
diff --git a/lib/libc/musl/src/unistd/lchown.c b/lib/libc/musl/src/unistd/lchown.c
deleted file mode 100644
index ccd5ee0255..0000000000
--- a/lib/libc/musl/src/unistd/lchown.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int lchown(const char *path, uid_t uid, gid_t gid)
-{
-#ifdef SYS_lchown
-	return syscall(SYS_lchown, path, uid, gid);
-#else
-	return syscall(SYS_fchownat, AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/link.c b/lib/libc/musl/src/unistd/link.c
deleted file mode 100644
index feec18e533..0000000000
--- a/lib/libc/musl/src/unistd/link.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int link(const char *existing, const char *new)
-{
-#ifdef SYS_link
-	return syscall(SYS_link, existing, new);
-#else
-	return syscall(SYS_linkat, AT_FDCWD, existing, AT_FDCWD, new, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/linkat.c b/lib/libc/musl/src/unistd/linkat.c
deleted file mode 100644
index 6a9a0b7759..0000000000
--- a/lib/libc/musl/src/unistd/linkat.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int linkat(int fd1, const char *existing, int fd2, const char *new, int flag)
-{
-	return syscall(SYS_linkat, fd1, existing, fd2, new, flag);
-}
diff --git a/lib/libc/musl/src/unistd/mips/pipe.s b/lib/libc/musl/src/unistd/mips/pipe.s
deleted file mode 100644
index ba2c39a304..0000000000
--- a/lib/libc/musl/src/unistd/mips/pipe.s
+++ /dev/null
@@ -1,20 +0,0 @@
-.set noreorder
-
-.global pipe
-.type   pipe,@function
-pipe:
-	lui $gp, %hi(_gp_disp)
-	addiu $gp, %lo(_gp_disp)
-	addu $gp, $gp, $25
-	li $2, 4042
-	syscall
-	beq $7, $0, 1f
-	nop
-	lw $25, %call16(__syscall_ret)($gp)
-	jr $25
-	subu $4, $0, $2
-1:	sw $2, 0($4)
-	sw $3, 4($4)
-	move $2, $0
-	jr $ra
-	nop
diff --git a/lib/libc/musl/src/unistd/mips64/pipe.s b/lib/libc/musl/src/unistd/mips64/pipe.s
deleted file mode 100644
index f8a27dccfb..0000000000
--- a/lib/libc/musl/src/unistd/mips64/pipe.s
+++ /dev/null
@@ -1,19 +0,0 @@
-.set	noreorder
-.global	pipe
-.type	pipe,@function
-pipe:
-	lui	$3, %hi(%neg(%gp_rel(pipe)))
-	daddiu	$3, $3, %lo(%neg(%gp_rel(pipe)))
-	daddu	$3, $3, $25
-	li	$2, 5021
-	syscall
-	beq	$7, $0, 1f
-	nop
-	ld	$25, %got_disp(__syscall_ret)($3)
-	jr	$25
-	dsubu	$4, $0, $2
-1:	sw	$2, 0($4)
-	sw	$3, 4($4)
-	move	$2, $0
-	jr	$ra
-	nop
diff --git a/lib/libc/musl/src/unistd/mipsn32/pipe.s b/lib/libc/musl/src/unistd/mipsn32/pipe.s
deleted file mode 100644
index 80f882e2b1..0000000000
--- a/lib/libc/musl/src/unistd/mipsn32/pipe.s
+++ /dev/null
@@ -1,19 +0,0 @@
-.set	noreorder
-.global	pipe
-.type	pipe,@function
-pipe:
-	lui	$3, %hi(%neg(%gp_rel(pipe)))
-	addiu	$3, $3, %lo(%neg(%gp_rel(pipe)))
-	addu	$3, $3, $25
-	li	$2, 6021
-	syscall
-	beq	$7, $0, 1f
-	nop
-	lw	$25, %got_disp(__syscall_ret)($3)
-	jr	$25
-	subu	$4, $0, $2
-1:	sw	$2, 0($4)
-	sw	$3, 4($4)
-	move	$2, $0
-	jr	$ra
-	nop
diff --git a/lib/libc/musl/src/unistd/pipe.c b/lib/libc/musl/src/unistd/pipe.c
deleted file mode 100644
index d07b8d24ae..0000000000
--- a/lib/libc/musl/src/unistd/pipe.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int pipe(int fd[2])
-{
-#ifdef SYS_pipe
-	return syscall(SYS_pipe, fd);
-#else
-	return syscall(SYS_pipe2, fd, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/renameat.c b/lib/libc/musl/src/unistd/renameat.c
deleted file mode 100644
index c3b40a258b..0000000000
--- a/lib/libc/musl/src/unistd/renameat.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <stdio.h>
-#include "syscall.h"
-
-int renameat(int oldfd, const char *old, int newfd, const char *new)
-{
-#ifdef SYS_renameat
-	return syscall(SYS_renameat, oldfd, old, newfd, new);
-#else
-	return syscall(SYS_renameat2, oldfd, old, newfd, new, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/rmdir.c b/lib/libc/musl/src/unistd/rmdir.c
deleted file mode 100644
index 6825ffc835..0000000000
--- a/lib/libc/musl/src/unistd/rmdir.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int rmdir(const char *path)
-{
-#ifdef SYS_rmdir
-	return syscall(SYS_rmdir, path);
-#else
-	return syscall(SYS_unlinkat, AT_FDCWD, path, AT_REMOVEDIR);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/setpgid.c b/lib/libc/musl/src/unistd/setpgid.c
deleted file mode 100644
index 061606951d..0000000000
--- a/lib/libc/musl/src/unistd/setpgid.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int setpgid(pid_t pid, pid_t pgid)
-{
-	return syscall(SYS_setpgid, pid, pgid);
-}
diff --git a/lib/libc/musl/src/unistd/setpgrp.c b/lib/libc/musl/src/unistd/setpgrp.c
deleted file mode 100644
index a2a37f65f3..0000000000
--- a/lib/libc/musl/src/unistd/setpgrp.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <unistd.h>
-
-pid_t setpgrp(void)
-{
-	return setpgid(0, 0);
-}
diff --git a/lib/libc/musl/src/unistd/symlink.c b/lib/libc/musl/src/unistd/symlink.c
deleted file mode 100644
index 0973d78a89..0000000000
--- a/lib/libc/musl/src/unistd/symlink.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int symlink(const char *existing, const char *new)
-{
-#ifdef SYS_symlink
-	return syscall(SYS_symlink, existing, new);
-#else
-	return syscall(SYS_symlinkat, existing, AT_FDCWD, new);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/symlinkat.c b/lib/libc/musl/src/unistd/symlinkat.c
deleted file mode 100644
index d1c59b4db0..0000000000
--- a/lib/libc/musl/src/unistd/symlinkat.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int symlinkat(const char *existing, int fd, const char *new)
-{
-	return syscall(SYS_symlinkat, existing, fd, new);
-}
diff --git a/lib/libc/musl/src/unistd/sync.c b/lib/libc/musl/src/unistd/sync.c
deleted file mode 100644
index f18765aa85..0000000000
--- a/lib/libc/musl/src/unistd/sync.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-void sync(void)
-{
-	__syscall(SYS_sync);
-}
diff --git a/lib/libc/musl/src/unistd/unlink.c b/lib/libc/musl/src/unistd/unlink.c
deleted file mode 100644
index c40c28d50b..0000000000
--- a/lib/libc/musl/src/unistd/unlink.c
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <unistd.h>
-#include <fcntl.h>
-#include "syscall.h"
-
-int unlink(const char *path)
-{
-#ifdef SYS_unlink
-	return syscall(SYS_unlink, path);
-#else
-	return syscall(SYS_unlinkat, AT_FDCWD, path, 0);
-#endif
-}
diff --git a/lib/libc/musl/src/unistd/unlinkat.c b/lib/libc/musl/src/unistd/unlinkat.c
deleted file mode 100644
index e0e25d22a3..0000000000
--- a/lib/libc/musl/src/unistd/unlinkat.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <unistd.h>
-#include "syscall.h"
-
-int unlinkat(int fd, const char *path, int flag)
-{
-	return syscall(SYS_unlinkat, fd, path, flag);
-}
diff --git a/lib/std/c.zig b/lib/std/c.zig
index 6bbf3cbe46..e68d5a71c5 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -10649,6 +10649,7 @@ pub extern "c" fn fread(noalias ptr: [*]u8, size_of_type: usize, item_count: usi
 pub extern "c" fn printf(format: [*:0]const u8, ...) c_int;
 pub extern "c" fn abort() noreturn;
 pub extern "c" fn exit(code: c_int) noreturn;
+pub extern "c" fn _Exit(code: c_int) noreturn;
 pub extern "c" fn _exit(code: c_int) noreturn;
 pub extern "c" fn isatty(fd: fd_t) c_int;
 pub extern "c" fn lseek(fd: fd_t, offset: off_t, whence: whence_t) off_t;
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 22a5b42999..f5868f71e9 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -1391,6 +1391,10 @@ pub fn faccessat(dirfd: i32, path: [*:0]const u8, mode: u32, flags: u32) usize {
     return syscall4(.faccessat2, @as(usize, @bitCast(@as(isize, dirfd))), @intFromPtr(path), mode, flags);
 }
 
+pub fn acct(path: [*:0]const u8) usize {
+    return syscall1(.acct, @intFromPtr(path));
+}
+
 pub fn pipe(fd: *[2]i32) usize {
     if (comptime (native_arch.isMIPS() or native_arch.isSPARC())) {
         return syscall_pipe(fd);
@@ -1601,11 +1605,27 @@ pub fn fchown(fd: i32, owner: uid_t, group: gid_t) usize {
     }
 }
 
+pub fn fchownat(fd: i32, path: [*:0]const u8, owner: uid_t, group: gid_t, flags: u32) usize {
+    return syscall5(.fchownat, @as(usize, @bitCast(@as(isize, fd))), @intFromPtr(path), owner, group, flags);
+}
+
 pub fn chown(path: [*:0]const u8, owner: uid_t, group: gid_t) usize {
     if (@hasField(SYS, "chown32")) {
         return syscall3(.chown32, @intFromPtr(path), owner, group);
-    } else {
+    } else if (@hasField(SYS, "chown")) {
         return syscall3(.chown, @intFromPtr(path), owner, group);
+    } else {
+        return fchownat(AT.FDCWD, path, owner, group, 0);
+    }
+}
+
+pub fn lchown(path: [*:0]const u8, owner: uid_t, group: gid_t) usize {
+    if (@hasField(SYS, "lchown32")) {
+        return syscall3(.lchown32, @intFromPtr(path), owner, group);
+    } else if (@hasField(SYS, "lchown")) {
+        return syscall3(.lchown, @intFromPtr(path), owner, group);
+    } else {
+        return fchownat(AT.FDCWD, path, owner, group, AT.SYMLINK_NOFOLLOW);
     }
 }
 
@@ -2064,7 +2084,11 @@ pub fn setpgid(pid: pid_t, pgid: pid_t) usize {
     return syscall2(.setpgid, @intCast(pid), @intCast(pgid));
 }
 
-pub fn getgroups(size: usize, list: ?*gid_t) usize {
+pub fn getpgid(pid: pid_t) usize {
+    return syscall1(.getpgid, @intCast(pid));
+}
+
+pub fn getgroups(size: usize, list: ?[*]gid_t) usize {
     if (@hasField(SYS, "getgroups32")) {
         return syscall2(.getgroups32, size, @intFromPtr(list));
     } else {
@@ -2084,6 +2108,10 @@ pub fn setsid() usize {
     return syscall0(.setsid);
 }
 
+pub fn getsid(pid: pid_t) usize {
+    return syscall1(.getsid, @intCast(pid));
+}
+
 pub fn getpid() pid_t {
     // Casts result to a pid_t, safety-checking >= 0, because getpid() cannot fail
     return @intCast(@as(u32, @truncate(syscall0(.getpid))));
diff --git a/src/libs/musl.zig b/src/libs/musl.zig
index 295e516930..3c2c4dd25f 100644
--- a/src/libs/musl.zig
+++ b/src/libs/musl.zig
@@ -704,8 +704,6 @@ const src_files = [_][]const u8{
     "musl/src/linux/arch_prctl.c",
     "musl/src/linux/brk.c",
     "musl/src/linux/cache.c",
-    "musl/src/linux/cap.c",
-    "musl/src/linux/chroot.c",
     "musl/src/linux/clock_adjtime.c",
     "musl/src/linux/clone.c",
     "musl/src/linux/copy_file_range.c",
@@ -713,7 +711,6 @@ const src_files = [_][]const u8{
     "musl/src/linux/eventfd.c",
     "musl/src/linux/fallocate.c",
     "musl/src/linux/fanotify.c",
-    "musl/src/linux/flock.c",
     "musl/src/linux/getdents.c",
     "musl/src/linux/getrandom.c",
     "musl/src/linux/gettid.c",
@@ -738,7 +735,6 @@ const src_files = [_][]const u8{
     "musl/src/linux/pwritev2.c",
     "musl/src/linux/quotactl.c",
     "musl/src/linux/readahead.c",
-    "musl/src/linux/reboot.c",
     "musl/src/linux/remap_file_pages.c",
     "musl/src/linux/sbrk.c",
     "musl/src/linux/sendfile.c",
@@ -1157,18 +1153,10 @@ const src_files = [_][]const u8{
     "musl/src/misc/syscall.c",
     "musl/src/misc/syslog.c",
     "musl/src/misc/wordexp.c",
-    "musl/src/mman/madvise.c",
-    "musl/src/mman/mincore.c",
-    "musl/src/mman/mlockall.c",
-    "musl/src/mman/mlock.c",
     "musl/src/mman/mmap.c",
-    "musl/src/mman/mprotect.c",
     "musl/src/mman/mremap.c",
     "musl/src/mman/msync.c",
-    "musl/src/mman/munlockall.c",
-    "musl/src/mman/munlock.c",
     "musl/src/mman/munmap.c",
-    "musl/src/mman/posix_madvise.c",
     "musl/src/mman/shm_open.c",
     "musl/src/mq/mq_close.c",
     "musl/src/mq/mq_getattr.c",
@@ -1304,7 +1292,6 @@ const src_files = [_][]const u8{
     "musl/src/process/execle.c",
     "musl/src/process/execlp.c",
     "musl/src/process/execv.c",
-    "musl/src/process/execve.c",
     "musl/src/process/execvp.c",
     "musl/src/process/fexecve.c",
     "musl/src/process/fork.c",
@@ -1871,51 +1858,26 @@ const src_files = [_][]const u8{
     "musl/src/time/utime.c",
     "musl/src/time/wcsftime.c",
     "musl/src/time/__year_to_secs.c",
-    "musl/src/unistd/access.c",
-    "musl/src/unistd/acct.c",
     "musl/src/unistd/alarm.c",
-    "musl/src/unistd/chdir.c",
-    "musl/src/unistd/chown.c",
     "musl/src/unistd/close.c",
-    "musl/src/unistd/ctermid.c",
     "musl/src/unistd/dup2.c",
     "musl/src/unistd/dup3.c",
-    "musl/src/unistd/dup.c",
-    "musl/src/unistd/_exit.c",
     "musl/src/unistd/faccessat.c",
     "musl/src/unistd/fchdir.c",
-    "musl/src/unistd/fchownat.c",
     "musl/src/unistd/fchown.c",
     "musl/src/unistd/fdatasync.c",
     "musl/src/unistd/fsync.c",
     "musl/src/unistd/ftruncate.c",
     "musl/src/unistd/getcwd.c",
-    "musl/src/unistd/getegid.c",
-    "musl/src/unistd/geteuid.c",
-    "musl/src/unistd/getgid.c",
-    "musl/src/unistd/getgroups.c",
     "musl/src/unistd/gethostname.c",
     "musl/src/unistd/getlogin.c",
     "musl/src/unistd/getlogin_r.c",
-    "musl/src/unistd/getpgid.c",
-    "musl/src/unistd/getpgrp.c",
-    "musl/src/unistd/getpid.c",
-    "musl/src/unistd/getppid.c",
-    "musl/src/unistd/getsid.c",
-    "musl/src/unistd/getuid.c",
     "musl/src/unistd/isatty.c",
-    "musl/src/unistd/lchown.c",
-    "musl/src/unistd/linkat.c",
-    "musl/src/unistd/link.c",
     "musl/src/unistd/lseek.c",
-    "musl/src/unistd/mips64/pipe.s",
     "musl/src/unistd/mipsn32/lseek.c",
-    "musl/src/unistd/mipsn32/pipe.s",
-    "musl/src/unistd/mips/pipe.s",
     "musl/src/unistd/nice.c",
     "musl/src/unistd/pause.c",
     "musl/src/unistd/pipe2.c",
-    "musl/src/unistd/pipe.c",
     "musl/src/unistd/posix_close.c",
     "musl/src/unistd/pread.c",
     "musl/src/unistd/preadv.c",
@@ -1925,13 +1887,9 @@ const src_files = [_][]const u8{
     "musl/src/unistd/readlinkat.c",
     "musl/src/unistd/readlink.c",
     "musl/src/unistd/readv.c",
-    "musl/src/unistd/renameat.c",
-    "musl/src/unistd/rmdir.c",
     "musl/src/unistd/setegid.c",
     "musl/src/unistd/seteuid.c",
     "musl/src/unistd/setgid.c",
-    "musl/src/unistd/setpgid.c",
-    "musl/src/unistd/setpgrp.c",
     "musl/src/unistd/setregid.c",
     "musl/src/unistd/setresgid.c",
     "musl/src/unistd/setresuid.c",
@@ -1940,17 +1898,12 @@ const src_files = [_][]const u8{
     "musl/src/unistd/setuid.c",
     "musl/src/unistd/setxid.c",
     "musl/src/unistd/sleep.c",
-    "musl/src/unistd/symlinkat.c",
-    "musl/src/unistd/symlink.c",
-    "musl/src/unistd/sync.c",
     "musl/src/unistd/tcgetpgrp.c",
     "musl/src/unistd/tcsetpgrp.c",
     "musl/src/unistd/truncate.c",
     "musl/src/unistd/ttyname.c",
     "musl/src/unistd/ttyname_r.c",
     "musl/src/unistd/ualarm.c",
-    "musl/src/unistd/unlinkat.c",
-    "musl/src/unistd/unlink.c",
     "musl/src/unistd/usleep.c",
     "musl/src/unistd/write.c",
     "musl/src/unistd/writev.c",